# How many stale blocks can be minted in 1.7? **URL:** \ **Category:** Uncategorized\ **Created:** [June 19, 2021, 9:24pm UTC](https://community.creditcoin.org/t/how-many-stale-blocks-can-be-minted-in-1-7/322 "2021-06-19T21:24:55Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![doebrmann](https://avatars.discourse-cdn.com/v4/letter/d/dbc845/32.png) [@doebrmann](https://community.creditcoin.org/u/doebrmann)\ **Post date:** [June 19, 2021, 9:24pm UTC](https://community.creditcoin.org/t/how-many-stale-blocks-can-be-minted-in-1-7/322/1 "2021-06-19T21:24:55Z")
I saw my mining rig followed 300~400 stale chain compare to block explorer. Is it normal situation? Stale chain can grow up before connecting to a peer holding main chain? How does fork logic choice main block? - highest chain? - old chain? - high difficulty? block a: 26 difficulty block minted at 14:00:00 block b: 27 difficulty block minted at 14:00:01 block c: 28 difficulty block minted at 14:00:59 a,b,c are from same parent block. block c is regareded as promising to be included main chain in 1.7? Let me know how to calculate weight of chain and when does fork fuction start working - after 30 blocks trailing? - every 30 minues? - when meet different block? ---
**Author:** ![taelimoh](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.creditcoin.org/taelimoh/32/3_2.png) [@taelimoh](https://community.creditcoin.org/u/taelimoh)\ **Post date:** [June 20, 2021, 6:26am UTC](https://community.creditcoin.org/t/how-many-stale-blocks-can-be-minted-in-1-7/322/2 "2021-06-20T06:26:21Z")
We see nodes occasionally creating long forks, especially when they lose “good” peers and get isolated. By good peers, I mean a node connected to other nodes and propagating the heaviest blockchain of the network to my node. When a node gets isolated, it will start mining by itself, continuously growing its fork. Given multiple forks, the node chooses the heaviest one. The weight of a fork is the sum of the difficulty of each block in the fork. In your example, a node will choose Block C since that is the heaviest. A node resolves forks whenever it encounters one. You can read how the node compares forks in the link below. I will circle back w/ a plain English explanation later. I want to answer your other questions first. [https://github.com/gluwa/Creditcoin/blob/dev/Creditcoin/PoW/PoW/](https://github.com/gluwa/Creditcoin/blob/dev/Creditcoin/PoW/PoW/) **init**.py#L657 ---
**Author:** ![doebrmann](https://avatars.discourse-cdn.com/v4/letter/d/dbc845/32.png) [@doebrmann](https://community.creditcoin.org/u/doebrmann)\ **Post date:** [June 20, 2021, 8:37am UTC](https://community.creditcoin.org/t/how-many-stale-blocks-can-be-minted-in-1-7/322/3 "2021-06-20T08:37:14Z")
thanks again. I understood. how do you think about this mining strategy - start solving quiz with higher difficulty by increasing original difficulty - if found nonce, never solve quiz again, but just wait next quiz. - close connection to peers if stale blocks are increasing. IMO, When I examine the main blocks the main block difficulty is not much higher than i expected. 1 or 2 higher than given condition. ---
**Author:** ![taelimoh](https://yyz1.discourse-cdn.com/flex031/user_avatar/community.creditcoin.org/taelimoh/32/3_2.png) [@taelimoh](https://community.creditcoin.org/u/taelimoh)\ **Post date:** [June 20, 2021, 8:48am UTC](https://community.creditcoin.org/t/how-many-stale-blocks-can-be-minted-in-1-7/322/4 "2021-06-20T08:48:52Z")
1.7 has a similar strategy implemented already. When it successfully mines a block, and it took less than the goal block time, instead of mining the next block, the node continues to mine the current block, hoping to mine a block with greater difficulty than the current one. The idea behind the strategy is similar to yours, optimize for the weight, not length. I want to note that we will see fewer forks as the difficulty of the network increases, which we expect to happen soon.